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Salary
≈ $69k – $127k per year (Estimated)
Location
Hybrid (Warsaw, Poland)
Seniority
Senior · 2+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 16, 2026. First seen by Alion on Jul 3, 2026. F5 scores B on the Alion truth index.

Overview
Company
Impact
Profile match

F5

F5 is an American application delivery and security company founded in 1996 that built its business on the BIG-IP load balancer, a device that sits in front of applications and distributes traffic across servers. As applications moved to cloud and containers it extended the same position into web application firewalling, bot defence, application programming interface security and multi-cloud networking, largely through the acquisitions of NGINX, Shape Security and Volterra. Headquartered in Seattle and listed on Nasdaq, it serves large enterprises and service providers whose most critical applications still run through its equipment.

At F5, we strive to bring a better digital world to life. Our teams empower organizations across the globe to create, secure, and run applications that enhance how we experience our evolving digital world. We are passionate about cybersecurity, from protecting consumers from fraud to enabling companies to focus on innovation.

Everything we do centers around people. That means we obsess over how to make the lives of our customers, and their customers, better. And it means we prioritize a diverse F5 community where each individual can thrive.

Join a team using leading edge security technology and processes to protect the F5 enterprise

and productenvironments. TheSr.Security Engineer position will develop and implement strategic processesand buildtechnical solutions to enable our information security program and continuously improve our security posture amidst the industry’s evolving technology landscape.

Primary Responsibilities

  • Identifyorganizational risks to confidentiality, integrity, and availability, and determineappropriate mitigations.

  • Leverage native Azure, GCP, and AWS cloud services to automate and improve existing security and control activities.

  • Develop or implementopen-source/third-party tools toassistin detection,preventionand analysis of security threats

  • Perform technical security assessments againstF5aaS product andenterprise cloud hosted, virtual, andon-premisesystems including static and dynamic analysis, and threat modeling.

  • Review and test changes to services, applications, and networks for potential security impacts.

  • Managepenetration and segmentation testing ofF5applications andnetworks.

  • Review changes to and ongoing operations ofenterpiseenvironments and supporting systems for security and compliance impacts.

  • Assistin detection and response efforts as a product line subject matter expert.

  • Propose new controls to Security Architecture and GRC.

  • Build and implement new security controls,processesand tools.

  • Implementzero-trustand IAM securitypatterns withcloud agnostictooling

  • Collaborate with Architecture, Site Reliability Engineering and Operations teams to develop and implement technical solutionsand security standards.

  • Configure industry standardsecurity testing/scanning tools (network scanning, code scanning, posture management).

  • Advise enterprise stakeholders on security best practices and secure design principles.

  • Implement, design, develop, administer, and manage enterprise security tooling.

Knowledge,Skillsand Abilities

  • Experience working with high-availability enterprise production environments

  • Ability to script in multiples languages (Go, Rust, Python, Ruby, etc.) and experience building scripts for process improvements and automation

  • Baseline competency in administration of Microsoft Azure Cloud, Amazon Web Services (AWS), Google Cloud Platform (GCP)or equivalent public cloud infrastructure.

  • Technical knowledge and extensive hands-on experience with security and networking architecture, networking protocols, network security design, wireless security, intrusion prevention/detection, andfirewallarchitecture.

  • Experience automating security testing and reporting outputs

  • Knowledge or familiarity with technologicalstack(Big-IP, Azure, AWS, GCP, CentOS,Linux, Kubernetes, DockerHashicorpVault, Palo Alto, Cisco, Qualys).

  • Experience assessing and implementing technical security controls

  • Exposure to DevOps tooling, CI/CD pipelines,container orchestration,and infrastructure as code approach (e.g.Puppet,Chef,Ansible,Terraform, Jenkins,CircleCI, Artifactory, Git)

  • Strong written and verbal communication skills.

  • Experience with network and application vulnerability and penetration testing tools

  • Willingness to innovate and learnnew technologies

  • Excellent interpersonal and relationship skills with a collaborative mindset

  • Strong written and verbal communication skills.

  • Strong self-directed work habits,exhibitinginitiative, drive, creativity, maturity,self-assuranceand professionalism.

  • Agile, tactful, andproactiveattitudethat can manage prioritization and know when to escalate.

Qualifications

  • B.S. or M.S. in Computer Science, Engineering, or related field, or equivalent experience

  • 5years ofprogressive responsibilityin a security organization

  • 2-6yearsof relevantsecurity engineering or network security experience

    #LI-SS5

The Job Description is intended to be a general representation of the responsibilities and requirements of the job. However, the description may not be all-inclusive, and responsibilities and requirements are subject to change.

Please note that F5 only contacts candidates through F5 email address (ending with @f5.com) or auto email notification from Workday (ending with f5.com or@myworkday.com).

Equal Employment Opportunity

It is the policy of F5 to provide equal employment opportunities to all employees and employment applicants without regard to unlawful considerations of race, religion, color, national origin, sex, sexual orientation, gender identity or expression, age, sensory, physical, or mental disability, marital status, veteran or military status, genetic information, or any other classification protected by applicable local, state, or federal laws. This policy applies to all aspects of employment, including, but not limited to, hiring, job assignment, compensation, promotion, benefits, training, discipline, and termination. F5 offers a variety of reasonable accommodations for candidates. Requesting an accommodation is completely voluntary. F5 will assess the need for accommodations in the application process separately from those that may be needed to perform the job. Request by contacting [email protected].

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